The turnpike authority said the tunnel was last inspected in September 2016. It would not say if there had been any recent work done in or around the area where the materials fell.

Traffic is now able to get through both ways in the tunnel using the northbound lanes. Around 8 a.m., crews opened the northbound lanes to two-way traffic while officials continue to work in the southbound lanes.

Earlier Wednesday, several trucks were involved in a collision on the Northeast Extension in Bucks County.